datasheet | august 2012 fiber optics | rev 2012.08 information contained herein is deemed reliable and accurate as of the issue date. emcore reserves the right to change the desi gn or specification at any time without notice. applications video signal distribution in hfc and fttx nodes signal distribution in l-band and wireless remoting links high linearity, low power fiber links features linear dfb laser design ouput power up to 10 dbm available bandwidth 5 ? 4000 mhz rohs compliance single and double optical isolator high slope efficiency up to 0.3mw/ma monitor photodiode emcore?s model 1955 dfb lasers offer a low cost solution for linear fiber optic links. these components can be cooled with external thermo-electric coolers for high stability, or run without tec?s to r educe power consumption. the dfb laser builds upon ortel?s long history of high performance, leading edge designs in catv, wireless, and high speed digital applications. the laser diode devices are packaged in a compact hermetic assemb ly together with monitor photodiode and isolator, for flexible integration into various transmitter configurations. performance highlights parameters min typical max units operating case temperature range -40 - 85 ? c optical output power (1) 3 5 6 9 10 - - - - - 4.9 5.9 8.9 9.9 11.9 dbm frequency range 5 - 4000 mhz carrier-to-noise ratio (79 channels) (1) 51 - - db composite second order (79 channels) (1) standard linearity enhanced linearity - - - - -55 -57 dbc composite triple beat (79 channels) (1) standard linearity enhanced linearity - - - - -65 -68 dbc optical return loss (1) 45 - - db side mode suppression ratio, cw (1) 30 - - db 1. performance at tcase = 25c 1955 f/r/w coaxial dfb laser diode 1550 nm cwdm 5 mhz ? 4000 mhz
datasheet | august 2012 fiber optics | rev 2012.08 information contained herein is deemed reliable and accurate as of the issue date. emcore reserves the right to change the desi gn or specification at any time without notice. absolute maximum ratings 1 stresses in excess of the absolute maximum ratings can caus e permanent damage to the device. these are absolute stress ratings only. functional operation of the device is not implied at these or any other conditions in excess of those given in th e operational sections of the data sheet. exposure to absolute maximum ratings for extended periods can adversely affect device reliability. parameters symbol condition/notes min max unit storage temperature t stg non-operating -40 85 o c operating case temperature t op continuous -40 85 o c laser diode forward current i op cw - 150 ma laser diode reverse voltage v r continuous - 1.0 v photodiode forward current i mpd continuous - 2 ma photodiode reverse voltage v mpd,r continuous - 10 v average rf input power pin 60 seconds - 62 dbmv lead soldering temperature/time - - - 260/10 o c/sec relative humidity rh continuous - 85 % esd - human body model -500 +500 v 1. absolute maximum data are limited to system design onl y; proper device performance is not guaranteed over rating listed above. operation beyond these maximum conditions may degrade device performance, lead to device failure, shorter lifetime, and will invalidate the device warranty. electrical/optical characteristics parameters symbol conditions/notes min typ max unit optical output power p o 1955r opt model: 3-6dbm 1955w opt model: 3-10 dbm 1955f opt model: 3-10 dbm 3 5 6 9 10 - - - - - 4.9 5.9 8.9 9.9 11.9 dbm threshold current i th t case = 25 oc t case = 45 oc - - 8 13 15 20 ma laser bias current i op - - 80 ma forward voltage v f i op - 1.17 1.8 v slope efficiency se t case = 25 oc, i op 0.07 - 0.3 mw/ma ? thermal slope efficiency tse se(tc)/se(25oc) t case = -20oc to 85 oc 0.4 - 1.2 - ? laser input impedance z - 2 4 8 ?? mpd current i mpd v mpd = 5v, i op 50 - 2000 ? a mpd dark current i d v mpd = 5v, i op = 0 t case = 25oc - - 50 na relative intensity noise rin cw, i op , t case = 25oc 5 mhz - 1002 mhz - - -150 db/hz 1955 f/r/w coaxial dfb laser diode 1550 nm cwdm 5 mhz ? 4000 mhz
datasheet | august 2012 fiber optics | rev 2012.08 information contained herein is deemed reliable and accurate as of the issue date. emcore reserves the right to change the desi gn or specification at any time without notice. electrical/optical characteristics (continued) parameters symbol conditions/notes min typ max unit tracking error pf i mon = const er = 10log(p o /2.0) [db] -1 - +1 db optical isolation, t case = 25oc iso double isolator single isolator 45 30 - - - - db spectral width (-20 db) ?? i op - 0.1 1.0 nm side mode suppression ratio smsr i op 30 45 - db optical return loss orl t case = 25oc 35 - - db rise time tr t case = 25oc - 0.05 0.10 ns fall time tf t case = 25oc - 0.10 0.15 ns extinction ratio er 10log (2.omw/pf (ith)) 10 - - db 1. referenced to base of to header. forward path rf characteristics 1955f performance parameter symbol conditions/notes min typ max unit frequency response flatness 1 |s 21 | 47 mhz ? 1002 mhz 5 mhz ? 4000 mhz - - - - 1 4 db p-p response up-tilt 1 47 mhz < f < 1002 mhz -1 3 db carrier-to-noise ratio 2,3,4 cnr i op 51 - - db composite second order 2,3,4 standard linearity enhanced linearity cso i op t case = 25oc - - - - -55 -57 dbc composite triple beat 2,3,4 standard linearity enhanced linearity ctb i op t case = 25oc - - - - -65 -68 dbc 1. i op , t case = 25 ? c. test with the laser input pin matched to a 50 ? system. 2. 3.7% omi, 79 ntsc unmodulated carriers (50 mhz to 550 mhz). 10 km fiber. 3. received power = 0 dbm. 4. i op , t case = 25 ? c. test with the laser input pin matched to a 75 ? system. return path rf characteristics 1955r performance parameters symbol conditions/notes min typ max unit frequency response flatness 1 |s 21 | 5 mhz - 200 mhz - - 1 db p-p second order distortion 2 standard linearity enhanced linearity dso p f = 3 dbm, omi = 10% each 2-tone test: f1=13mhz, f2=19mhz 20 km of fiber (7.5 db total loss with connector) dso meas at 6mhz, 32mhz - - - - -45 -50 dbc third order distortion 2 standard linearity enhanced linearity dtb p f = 3 dbm, omi = 10% each 2-tone test: f1=13mhz, f2=19mhz 20 km of fiber (7.5 db total loss with connector) dto meas at 7mhz, 25mhz - - - - -63 -65 dbc 1. i op , t case = 25 ? c. test with the laser input pin matched to a 50 ? system. 2. i op , t case = 25 ? c. test with laser input pin matched to a 75 ? system. 1955 f/r/w coaxial dfb laser diode 1550 nm cwdm 5 mhz ? 4000 mhz
datasheet | august 2012 fiber optics | rev 2012.08 information contained herein is deemed reliable and accurate as of the issue date. emcore reserves the right to change the desi gn or specification at any time without notice. wide bandwidth path rf characteristics 1955w performance parameters symbol conditions/notes min typ max unit frequency response flatness 1 |s 21 | 900 mhz ? 4000 mhz - - 4 db p-p input third order intercept 2 iip3 standard linearity, i bb 30 - - dbm 1db compression point 3 p 1db i bb 16 - - dbm 1. i op , t case = 25 ? c. test with the laser input pin matched to a 50 ? system. 2. iip3 is measured at i bb where i bb is the bias point at which simultaneously t he laser at its best linearity and the optical power is within specification. test frequency f1 = 2700mhz, f2 = 2703mhz, rf in = 0dbm/frequency. 0km fiber. 3. test at 2700mhz. 0km fiber. package outline drawing (dimensions are in mm) mounting bracket 1955 f/r/w coaxial dfb laser diode 1550 nm cwdm 5 mhz ? 4000 mhz
datasheet | august 2012 fiber optics | rev 2012.08 information contained herein is deemed reliable and accurate as of the issue date. emcore reserves the right to change the desi gn or specification at any time without notice. reliability/quality designed to meet qualificati on requirements of telcordia tm (bellcore) gr-468-core. schematic and pinout schematic and pinout a pin definitions for pinout a laser safety this product meets the appropriate standard in title 21 of t he code of federal regulations (cfr). fda/cdrh class 1 laser product. this device has been classified with the fda/cdrh under accession number 0220191. all version of this laser are class 1 laser produc t, tested according to iec 60825-1:2007/en 60825-1:2007 single-mode fiber pigtail with sc/apc connectors (standard). wavelength = 1.3 ? m. maximum power = 50 mw. because of size constraints, laser safety labeling (including an fda class 1 label) is not affixed to the module, but attached to the outside of the shipping carton. pr oduct is not shipped with power supply. caution: use of controls, adjustments and procedures other than those specified herein may result in hazardous laser radiation exposure. pin description 1 ld anode, case ground 2 ld cathode 3 pd cathode 4 pd anode 1955 f/r/w coaxial dfb laser diode 1550 nm cwdm 5 mhz ? 4000 mhz 1 2 3 4 pd ld pinout a 1 2 3 4 pd ld pinout a bottom view
datasheet | august 2012 fiber optics | rev 2012.08 information contained herein is deemed reliable and accurate as of the issue date. emcore reserves the right to change the desi gn or specification at any time without notice. ordering code definitions 1955x - a - bb - c - dddd - ww - yy - z example 1955f-b-di-a-1550-sa-10-n : forward path uncooled 1550 nm cwdm coaxial laser, enhanced linearity, double isolator, pinout a, 1550 nm, sc/apc optical connector, 10 dbm optical power, no mounting bracket. 1955 f/r/w coaxial dfb laser diode 1550 nm cwdm 5 mhz ? 4000 mhz family name 1955f: forward path 1955r: return path 1955w: wide bandwidth pinout c = a: pinout a distortion performance a = a: standard linearity a = b: enhanced linearity ( not available for 1955w ) fiber length, optical connector ww = fa: fc/apc, 900 micron buffer, 1.0 ? 1.4 meter ww = sa: sc/apc, 900 micron buffer, 1.0 ? 1.4 meter optical output power yy = 03: 3 dbm (2 mw) yy = 05: 5 dbm (3 mw) yy = 06: 6 dbm (4 mw) yy = 09: 9 dbm (8 mw) ? ( only available for 1935f and 1935w ) yy = 10: 10 dbm (10 mw) ? ( only available for 1935f and 1935w ) mounting bracket z = b: mounting bracket z = n: no mounting bracket optical isolator bb = di: double isolator ( only available for optical 3 ? 6dbm ) bb = si: single isolator o-band wavelength dddd = 1470:1470 nm dddd = 1590:1590 nm dddd = 1490:1490 nm dddd = 1610:1610 nm dddd = 1510:1510 nm dddd = 1530:1530 nm dddd = 1550:1550 nm dddd = 1570:1570 nm
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